<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<input type="text" placeholder="员工姓名" id="i1">
<input type="text" placeholder="员工工资" id="i2">
<input type="text" placeholder="员工工作" id="i3">
<input type="button" value="添加" onclick="f()">
<table border="1">
    <caption>员工列表</caption>
    <tr>
        <th>姓名</th>
        <th>工资</th>
        <th>工作</th>
    </tr>
</table>

<script>
    function f() {
        //1.创建tr
        let tr = document.createElement("tr");
        //创建3个td
        let td1 = document.createElement("td");
        let td2 = document.createElement("td");
        let td3 = document.createElement("td");
        //3.得到三个文本框并把三个文本框的值给3个td
        /*let i1 = document.querySelector("#i1");
        let i2 = document.querySelector("#i2");
        let i3 = document.querySelector("#i3");*/
        td1.innerText = i1.value;
        td2.innerText = i2.value;
        td3.innerText = i3.value;
        //4.把td装进tr
        tr.append(td1, td2, td3);
        //5.得到table 并把tr装进table
        let table = document.querySelector("table");
        table.append(tr);
    }
</script>
</body>
</html>